Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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