Gaya APA

Seligman, E, R., Johnson, A. (1967). Encyclopedia Of The Social Sciences Volumes 13-14 Pur-Tra (Vol. 13-14.). America: The Macmillan Company.

Gaya MLA

Seligman, Edwin, R.A.., Johnson, Alvin. "Encyclopedia Of The Social Sciences Volumes 13-14 Pur-Tra". Vol. 13-14. America: The Macmillan Company, 1967. Text.