Cita APA (7th ed.)

Howkins, K. G., & Alexander, J. W. (1973). The challenge of religious studies. InterVarsity Press.

Cita Chicago (17th ed.)

Howkins, Kenneth G., i John W. Alexander. The Challenge of Religious Studies. Illinois: InterVarsity Press, 1973.

Cita MLA (9th ed.)

Howkins, Kenneth G., i John W. Alexander. The Challenge of Religious Studies. InterVarsity Press, 1973.