APA
Gruba L. K., . (2016). Guide notes and cases on the general principles of taxation and the organization of the B.I.R. Philippines: REX Book Store.
Chicago
Gruba Lily K, . 2016. Guide notes and cases on the general principles of taxation and the organization of the B.I.R. Philippines: REX Book Store.
Harvard
Gruba L. K., . (2016). Guide notes and cases on the general principles of taxation and the organization of the B.I.R. Philippines: REX Book Store.
MLA
Gruba Lily K, . Guide notes and cases on the general principles of taxation and the organization of the B.I.R. Philippines: REX Book Store. 2016.