Cita APA (7a ed.)

LEN, E., & YUE, P. (1988). Secondary 2 vocabulary guide and practice. reston Corporation.

Cita Chicago Style (17a ed.)

LEN, Evelyn, y P.S YUE. Secondary 2 Vocabulary Guide and Practice. Singaphore: reston Corporation, 1988.

Cita MLA (9a ed.)

LEN, Evelyn, y P.S YUE. Secondary 2 Vocabulary Guide and Practice. reston Corporation, 1988.