Gaya APA

SWALES, J, M., FEAK, C, B. (2009). Abstracts and the writing of abstracts . Unites States of America: Acid-free paper.

Gaya MLA

SWALES, John, M.., FEAK, Christine, B.. "Abstracts and the writing of abstracts". Unites States of America: Acid-free paper, 2009. Buku.