APA (7th ed.) Citation

RATIH, K., SRI SLAMET, & RAHAYU, M. (1999). English for oral proficiebcy 3. UMP.

Chicago Style (17th ed.) Citation

RATIH, Koesoema, SRI SLAMET, and Mundi RAHAYU. English for Oral Proficiebcy 3. Surakarta: UMP, 1999.

MLA (9th ed.) Citation

RATIH, Koesoema, et al. English for Oral Proficiebcy 3. UMP, 1999.