APA Style
Dowling, B, T., Arden, M, M. (1982).
Business concepts for english (2).
Boston:
Heinle & Heinle Publishers.
MLA Style
Dowling, Barbara, Tolley., Arden, Marianne, McDougal.
"Business concepts for english".
2
Boston:
Heinle & Heinle Publishers,
1982.
Bahasa Inggris.