Cita APA

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

Chicago Style Citation

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

Cita MLA

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

Atenció: Aquestes cites poden no estar 100% correctes.