Gaya APA
Sitorus, R, H. (1983).
Cara Mudah Belajar Bahsa Inggris ( english Two - Word Verbs ) .
Bandung:
pionir english program.
Gaya MLA
Sitorus, Ronald, H..
"Cara Mudah Belajar Bahsa Inggris ( english Two - Word Verbs )".
Bandung:
pionir english program,
1983.
Text.