Cita APA (7a ed.)

Adriana, M., & Felix, B. (1978). Past events - present life: Social studies (7., rev. print.). Sree Rama Book Depot.

Cita Chicago Style (17a ed.)

Adriana, M., y Br Felix. Past Events - Present Life: Social Studies. 7., rev. print. Secunderabad [u.a.]: Sree Rama Book Depot, 1978.

Cita MLA (9a ed.)

Adriana, M., y Br Felix. Past Events - Present Life: Social Studies. 7., rev. print. Sree Rama Book Depot, 1978.