Cita APA (7th ed.)
Verwer, G., & Collins, T. (1983). No turning back. Tyndale house.
Cita Chicago (17th ed.)
Verwer, George, i Tony Collins. No Turning Back. IIIinois: Tyndale house, 1983.
Cita MLA (9th ed.)
Verwer, George, i Tony Collins. No Turning Back. Tyndale house, 1983.
Atenció: Aquestes cites poden no estar 100% correctes.