Παραπομπή APA

Fulmer, R. M. (1977). Practical human relations. Richard D. Irwin.

Παραπομπή Chicago Style

Fulmer, Robert M. Practical Human Relations. Homewood: Richard D. Irwin, 1977.

Παραπομπή MLA

Fulmer, Robert M. Practical Human Relations. Richard D. Irwin, 1977.