APA (7th ed.) Citation

Del Grande, J. J., Egsgard, J. C., Mulligan, H. A., & Coleman, A. J. (1967). An introduction to the nature of proof. Gage.

Chicago Style (17th ed.) Citation

Del Grande, J. J., J. C. Egsgard, H. A. Mulligan, and A. J. Coleman. An Introduction to the Nature of Proof. Toronto: Gage, 1967.

MLA (9th ed.) Citation

Del Grande, J. J., et al. An Introduction to the Nature of Proof. Gage, 1967.