Παραπομπή APA

Zangwill, O. L. (1950). Introduction to modern psychology. Methun & Co.

Παραπομπή Chicago Style

Zangwill, O. L. Introduction to Modern Psychology. London: Methun & Co, 1950.

Παραπομπή MLA

Zangwill, O. L. Introduction to Modern Psychology. Methun & Co, 1950.