Citazione Stile APA (7a Edizione)

Valencia, E. G. (2007). Income taxation: Principles and laws with accounting applications (4th ed.). Valencia Educational Supply.

Citazione stile Chigago Style (17a edizione)

Valencia, Edwin G. Income Taxation: Principles and Laws with Accounting Applications. 4th ed. Baguio City: Valencia Educational Supply, 2007.

Citatione MLA (9a ed.)

Valencia, Edwin G. Income Taxation: Principles and Laws with Accounting Applications. 4th ed. Valencia Educational Supply, 2007.