APA Format
35106. (1990). Hari-hari "Dies Natalis". Jakarta : PPITK
MLA Format
35106. Hari-hari "Dies Natalis". Jakarta : PPITK, 1990
Chicago Format
35106. Hari-hari "Dies Natalis". Jakarta : PPITK, 1990
Australian/Harvard Format
35106. 1990. Hari-hari "Dies Natalis". PPITK Jakarta