APA引文

Ritter-Röhr, D. (1971). Prostitution in Frankfurt. [s.n.].

Chicago Style (17th ed.) Citation

Ritter-Röhr, Dorothea. Prostitution in Frankfurt. Giessen: [s.n.], 1971.

MLA引文

Ritter-Röhr, Dorothea. Prostitution in Frankfurt. [s.n.], 1971.

警告：这些引文格式不一定是100％准确.