Style de citation APA (7e éd.)

Bonifacio, A. L., & Solina, B. C. (1998). Beginnings 2: Why the sky is curved. Adarna Book Services.

Style de citation Chicago (17e éd.)

Bonifacio, Amelia Lapena, et Bernadette C. Solina. Beginnings 2: Why the Sky Is Curved. Quezon City: Adarna Book Services, 1998.

Style de citation MLA (9e éd.)

Bonifacio, Amelia Lapena, et Bernadette C. Solina. Beginnings 2: Why the Sky Is Curved. Adarna Book Services, 1998.