APA
(1991). English For Secondary Schools Fourth Year. Congressional Ave., cor Jupiter Street Project 6, Quezon City: Bienvenido, Santos V. Dory, De Guzman J.
Chicago
1991. English For Secondary Schools Fourth Year. Congressional Ave., cor Jupiter Street Project 6, Quezon City: Bienvenido, Santos V. Dory, De Guzman J.
Harvard
(1991). English For Secondary Schools Fourth Year. Congressional Ave., cor Jupiter Street Project 6, Quezon City: Bienvenido, Santos V. Dory, De Guzman J.
MLA
English For Secondary Schools Fourth Year. Congressional Ave., cor Jupiter Street Project 6, Quezon City: Bienvenido, Santos V. Dory, De Guzman J. 1991.