APA (7th ed.) Citation

Gondin, W. R., & Mammen, E. W. (1970). Made simple: The art of speaking.

Chicago Style (17th ed.) Citation

Gondin, William R., and Edward W. Mammen. Made Simple: The Art of Speaking. London : Made Simple Books, 1970.

MLA (9th ed.) Citation

Gondin, William R., and Edward W. Mammen. Made Simple: The Art of Speaking. 1970.