Gaya APA

Purbacaraka, P., Soekanto, S. (2015). Perihal Kaedah Hukum . Bandung: PT. Citra Aditya Bakti.

Gaya MLA

Purbacaraka, Purnadi., Soekanto, Soejono. "Perihal Kaedah Hukum". Bandung: PT. Citra Aditya Bakti, 2015. Book.