APA (7th ed.) Citation

Zeleny, R. O. (1991). The world book atlas (Revised ed.). World Book-Childcraft Internat..

Chicago Style (17th ed.) Citation

Zeleny, Robert O. The World Book Atlas. Revised ed. Chicago: World Book-Childcraft Internat., 1991.

MLA (9th ed.) Citation

Zeleny, Robert O. The World Book Atlas. Revised ed. World Book-Childcraft Internat., 1991.

Warning: These citations may not always be 100% accurate.