Παραπομπή APA

Kending, K. (2008). Sink or float ?: Thought problems in math and physics. The Mathematical Association of America.

Παραπομπή Chicago Style

Kending, Keith. Sink or Float ?: Thought Problems in Math and Physics. Washington: The Mathematical Association of America, 2008.

Παραπομπή MLA

Kending, Keith. Sink or Float ?: Thought Problems in Math and Physics. The Mathematical Association of America, 2008.