APA引文

BLACK SAM. (1993). PRACTICAL PUBLIC RELATIONS (4.). UNIVERSAL BOOKS.

芝加哥风格引文

BLACK SAM. PRACTICAL PUBLIC RELATIONS. 4. NEW DELHI: UNIVERSAL BOOKS, 1993.

MLA引文

BLACK SAM. PRACTICAL PUBLIC RELATIONS. 4. UNIVERSAL BOOKS, 1993.

警告：这些引文格式不一定是100％准确.