Παραπομπή σε μορφή APA (7η εκδ.)

Bell, P. W., & Torado, M. P. (1969). Economic theory: An integrated text with special reference to tropical Africa and other ... Oxford Univ. press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Bell, Philip W., και Michael P. Torado. Economic Theory: An Integrated Text with Special Reference to Tropical Africa and Other ... Nairobi: Oxford Univ. press, 1969.

Παραπομπή σε μορφή MLA (9th εκδ.)

Bell, Philip W., και Michael P. Torado. Economic Theory: An Integrated Text with Special Reference to Tropical Africa and Other ... Oxford Univ. press, 1969.