APA aipamena

Kaplan, J. (1966). Mr. Clemens and mark Twain. Penguin Books.

Chicago Style aipamena

Kaplan, Justin. Mr. Clemens and Mark Twain. Harmondsworth: Penguin Books, 1966.

MLA aipamena

Kaplan, Justin. Mr. Clemens and Mark Twain. Penguin Books, 1966.