APA (7th ed.) Citation

Blocher, D. H., Dustin, E. R., & Dugan, W. E. (1971). Guidance systems; an introduction to student personnel work. Ronald Press.

Chicago Style (17th ed.) Citation

Blocher, Donald H., E. Richard Dustin, and Willis Edwin Dugan. Guidance Systems; an Introduction to Student Personnel Work. New York: Ronald Press, 1971.

MLA (8th ed.) Citation

Blocher, Donald H., et al. Guidance Systems; an Introduction to Student Personnel Work. Ronald Press, 1971.