APA (7th ed.) Citation

(1973). Zamboanga-Sulu barter trade. s.n.

Chicago Style (17th ed.) Citation

Zamboanga-Sulu Barter Trade. [S.l: s.n, 1973.

MLA (9th ed.) Citation

Zamboanga-Sulu Barter Trade. s.n, 1973.

Warning: These citations may not always be 100% accurate.