Cita APA (7th ed.)

Nygaard, R., & Doud, G. R. (1994). Tragedy to triumph. David C.Cook.

Cita Chicago (17th ed.)

Nygaard, Reuel, i Guy R. Doud. Tragedy to Triumph. Illinois: David C.Cook, 1994.

Cita MLA (9th ed.)

Nygaard, Reuel, i Guy R. Doud. Tragedy to Triumph. David C.Cook, 1994.