APA (7th ed.) Citation

Williams, R. E. (1991). Teach yourself -- 1-2-3 (2nd ed.). Global Pub.

Chicago Style (17th ed.) Citation

Williams, Robert E. Teach Yourself -- 1-2-3. 2nd ed. Manila: Global Pub, 1991.

MLA (9th ed.) Citation

Williams, Robert E. Teach Yourself -- 1-2-3. 2nd ed. Global Pub, 1991.