APA Style

OPTIMIS : JAN. (1981). -: PT. SINAR AGAPE PRESS.

Chicago Style

OPTIMIS : JAN. . -: PT. SINAR AGAPE PRESS, 1981. .

MLA Style

OPTIMIS : JAN. . -: PT. SINAR AGAPE PRESS, 1981. .

Turabian Style

OPTIMIS : JAN. -: PT. SINAR AGAPE PRESS, 1981. .