Gaya APA

BJH Bachruddin Yusuf Habibie. (1987). : .

Gaya Chicago

BJH Bachruddin Yusuf Habibie. . : , 1987. Text.

Gaya MLA

BJH Bachruddin Yusuf Habibie. . : , 1987. Text.

Gaya Turabian

BJH Bachruddin Yusuf Habibie. : , 1987. Print.