Gaya APA

SIBUEA/2014010462030, R, M., Haywood, R. (1987). All about PR (1). Singapore: Mc Graw Hill.

Gaya MLA

SIBUEA/2014010462030, RANDY, MARULI., Haywood, Roger. "All about PR". 1 Singapore: Mc Graw Hill, 1987. Text.