Sebastian, G. V., Valdez, G. E., & Sebastian, A. V. (2022). The exercise of the power of taxation: Tax principles (2022 edition.). Rex Bookstore.
Lua i Stíl Chicago (17ú heag.)Sebastian, Guillermo V., Gerry E. Valdez, agus Alexander V. Sebastian. The Exercise of the Power of Taxation: Tax Principles. 2022 edition. Manila: Rex Bookstore, 2022.
Lua MLA (9ú heag.)Sebastian, Guillermo V., et al. The Exercise of the Power of Taxation: Tax Principles. 2022 edition. Rex Bookstore, 2022.
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