Παραπομπή σε μορφή APA (7η εκδ.)

Reader's Digest Association. (1990). How was it done? Reader's Digest Association.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Reader's Digest Association. How Was It Done? London ; New York: Reader's Digest Association, 1990.

Παραπομπή σε μορφή MLA (8th εκδ.)

Reader's Digest Association. How Was It Done? Reader's Digest Association, 1990.