Cita APA (7th ed.)

SURYADIPUTRA, W. (1992). Speaking upper-intermediate: Study guide.-- ed.1. UT LP3B and Oxford English.

Cita Chicago (17th ed.)

SURYADIPUTRA, Wendy. Speaking Upper-intermediate: Study Guide.-- Ed.1. Jakarta: UT LP3B and Oxford English, 1992.

Cita MLA (9th ed.)

SURYADIPUTRA, Wendy. Speaking Upper-intermediate: Study Guide.-- Ed.1. UT LP3B and Oxford English, 1992.