Gaya APA

Dowling, B, T., Mcdougal, M. (1982). Business concepts for english practice (-). U.S.A: bury House Publishers.

Gaya MLA

Dowling, Barbara, Tolley., Mcdougal, Marianne. "Business concepts for english practice". - U.S.A: bury House Publishers, 1982. Buku Pend. Bahasa Inggris.