Citazione Stile APA (7a Edizione)

SURYADIPUTRA, W. (1992). Writing upper - intermediate: Study guide. LP3B UT and Oxford english.

Citazione stile Chigago Style (17a edizione)

SURYADIPUTRA, Wendy. Writing Upper - Intermediate: Study Guide. Jakarta: LP3B UT and Oxford english, 1992.

Citatione MLA (9a ed.)

SURYADIPUTRA, Wendy. Writing Upper - Intermediate: Study Guide. LP3B UT and Oxford english, 1992.