Gaya APA
Marilyn, T, B, ,. (2002).
Learning Grammar 1 ( over 300 questions to test your grammar ) (1).
Singapore:
Bhuana Ilmu Populer.
Gaya MLA
Marilyn, Tan, B.A, ,.
"Learning Grammar 1 ( over 300 questions to test your grammar )".
1
Singapore:
Bhuana Ilmu Populer,
2002.
Text.