APA (7th ed.) Citation

Cobb, D. F. (1983). 1-2-3 for business. National Book Store.

Chicago Style (17th ed.) Citation

Cobb, Douglas Ford. 1-2-3 for Business. Manila: National Book Store, 1983.

MLA (9th ed.) Citation

Cobb, Douglas Ford. 1-2-3 for Business. National Book Store, 1983.