APA (7. basım) Alıntı

Preston, R. (1982). Teaching world understanding. Prentice-Hall.

Chicago Style (17. basım) Atıf

Preston, Ralph. Teaching World Understanding. New yark: Prentice-Hall, 1982.

MLA (9th ed.) Atıf

Preston, Ralph. Teaching World Understanding. Prentice-Hall, 1982.