Παραπομπή APA

Helfgott, R. B. (1974). Labor economics ed by albert Blum. Random House.

Παραπομπή Chicago Style

Helfgott, Roy B. Labor Economics Ed by Albert Blum. New York: Random House, 1974.

Παραπομπή MLA

Helfgott, Roy B. Labor Economics Ed by Albert Blum. Random House, 1974.