APA ציטוט

Ledin, G. (1980). A structured approach to essential basic. San Francisco, Calif: Boyd & Fraser Pub. Co.

Trích dẫn kiểu Chicago

Ledin, George. A Structured Approach to Essential Basic. San Francisco, Calif: Boyd & Fraser Pub. Co, 1980.

ציטוט MLA

Ledin, George. A Structured Approach to Essential Basic. San Francisco, Calif: Boyd & Fraser Pub. Co, 1980.