APA (7th ed.) Citation

Reader's Digest. (1969). The Reader's Digest great world atlas (2nd ed.). Reader's Digest Association.

Chicago Style (17th ed.) Citation

Reader's Digest. The Reader's Digest Great World Atlas. 2nd ed. London: Reader's Digest Association, 1969.

MLA (8th ed.) Citation

Reader's Digest. The Reader's Digest Great World Atlas. 2nd ed. Reader's Digest Association, 1969.