Παραπομπή APA

Barber, J. D. (1974). Choosing the president. N J Prentice Hall.

Παραπομπή Chicago Style

Barber, James David. Choosing the President. Cliffs: N J Prentice Hall, 1974.

Παραπομπή MLA

Barber, James David. Choosing the President. N J Prentice Hall, 1974.