APA (7th ed.) Citation

De Leon, H. S. (1995). Comments and cases on sales (4th ed.). Rex Book Store.

Chicago Style (17th ed.) Citation

De Leon, Hector S. Comments and Cases on Sales. 4th ed. Manila: Rex Book Store, 1995.

MLA (9th ed.) Citation

De Leon, Hector S. Comments and Cases on Sales. 4th ed. Rex Book Store, 1995.