Gaya APA
Lackstrom, J, E., White, R, V. (1983).
Moving up : intermediate functional english .
Boston, Massachusetts:
Heinle & Heinle Pub. Inc..
Gaya MLA
Lackstrom, John, E.., White, Ronald, V..
"Moving up : intermediate functional english".
Boston, Massachusetts:
Heinle & Heinle Pub. Inc.,
1983.
Text.