Gaya APA

Dixson, R, J., Swanson, C, P. (NULL). Modern american english 3 workbook . New: New York: Regents Publishing; 1971.

Gaya MLA

Dixson, Robert, J.., Swanson, Carl, P.. "Modern american english 3 workbook". New: New York: Regents Publishing; 1971, NULL. Text.