In author-oriented citing, expressions marking the continuation of the above reference are inserted in the sentences following the in-text reference. Then, the same reference also covers the subsequent sentences. The uninterrupted referencing sequence ends in the writer’s own text (e.g., a comment on the reference), a new in-text reference, or the end of the paragraph.
When the treatment of the matter continues in the subsequent sentences, the basic assumption is that the reader associates them with the above source. The uninterrupted referencing sequence ends in a new in-text reference, the writer’s own text, or the end of the paragraph. The pages referred to often change within the same referencing sequence, which must be immediately indicated to the reader.
The in-text reference is placed within the first sentence, and the writer must make sure that the reader understands that the subsequent sentences, too, are connected with the same in-text reference.
In case you need to refer to another page of the same source within the same paragraph, instead of repeating the source you can use the abbreviation op. cit. (< Lat. opere citato, ‘from the work cited’).
In subject-oriented referencing, you can use the abbreviation op. cit. (‘in the cited work’) when referring to the same source as above, but only within the same paragraph (= a portion of text delimited by blink lines). In that case, too, the page(s) must be mentioned.
In the absence of page numbers, the abbreviation op. cit. is used without one. The following example includes, between sentences referring to the source, one sentence consisting of the thesis writer’s own reasoning.