• Malaya, J. Eduardo and Casis, Rommel J., Treaties: Guidance on Practice and Procedures, Metro Manila, DFA and U.P. Law Center, 2018.

• Malaya, J. Eduardo and Dampil-Mandigma, Crystal Gale, Philippine Treaties In Force, 2020, Mero Manila, U.P. Law Center, 2021.

• Aust, Anthony, Modern Treaty Law and Practice, Cambridge, Cambridge University Press, 2013.

For the U.P. Law Center books, kindly order through the U.P. Law Center Bookroom: law.upd.edu.ph/uplc-bookroom-purchase-procedure/

Vienna Convention on the Law of Treaties

Executive Order No. 459 (s. 1997) (Guidelines in the Negotiation of International Agreements and its Ratification)

Memorandum Circular No. 16 (s. 2017) (Guidelines covering Requests for Authorization to Negotiate and Sign International Agreements, and Agreements covering Borrowing, Guarantees and Foreign Grants)

OTLA Circular No. 01-2007 (Procedures in the Negotiation, Signing, Ratification and Entry into Force of International Agreements)

OTLA Circular No. 01-2017 (Guidelines in the Signing and Approval of International Agreements, Borrowings, Guarantees and Foreign Grants and Acceptance of Foreign Donations)

OTLA Circular No. 02-2019 (Documentary Requirements for the Issuance of Full Powers/Special Authority)

OTLA Circular No. 03-2019 (Standard Final and Related Clauses for International Agreements)

The Philippine Treaty-Making Practice

UN Treaty Handbook