Gaya APA

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

Gaya MLA

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