Subject-oriented citing is used when presenting facts (such as laws and statutes, or factual knowledge of other kinds), void of interpretation or opinions. In that case, the in-text reference is within parentheses, in the first sentence.
In-text references placed after the paragraph to refer to the entire paragraph are not used. Instead, in-text references are placed within the paragraph.
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 reader’s/thesis writer’s own reasoning.