APA Citation

Lopez, V. (1936). Knock, knock, who's there? New York: L. Feist.

Chicago Style Citation

Lopez, Vincent. Knock, Knock, Who's There? New York: L. Feist, 1936.

MLA Citation

Lopez, Vincent. Knock, Knock, Who's There? New York: L. Feist, 1936.

Warning: These citations may not always be 100% accurate.