Gaya APA

Edy Purwito, Drs.. (1991). PSPB . : .

Gaya Chicago

Edy Purwito, Drs.. PSPB. : , 1991. Text.

Gaya MLA

Edy Purwito, Drs.. PSPB. : , 1991. Text.

Gaya Turabian

Edy Purwito, Drs.. PSPB. : , 1991. Print.