Παραπομπή σε μορφή APA (7η εκδ.)

Gruba, L. K. (2016). Guide notes and cases on the general principles of taxation and the organization of the BIR. Published & distributed by Rex Book Store.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Gruba, Lily K. Guide Notes and Cases on the General Principles of Taxation and the Organization of the BIR. Manila: Published & distributed by Rex Book Store, 2016.

Παραπομπή σε μορφή MLA (9th εκδ.)

Gruba, Lily K. Guide Notes and Cases on the General Principles of Taxation and the Organization of the BIR. Published & distributed by Rex Book Store, 2016.