Gaya APA

Nasution, A, F, N, S, U, H. (1905). Buku Ajar Kewirausahaan (Al Firah, Ngatno Sahputra, Umar Hamdan Nasution) . YOGYAKARTA: Deepublish.

Gaya MLA

Nasution, Al, Firah,, Ngatno, Sahputra,, Umar, Hamdan. "Buku Ajar Kewirausahaan (Al Firah, Ngatno Sahputra, Umar Hamdan Nasution)". YOGYAKARTA: Deepublish, 1905. Hukum Tata Negara Islam.