Gaya APA

Monfries, J. (2015). The life of Sultan Hamengkubuwono IX of Yogyakarta: A Prince in a Republic . Singapore: institut of soul heast asian studies.

Gaya MLA

Monfries, John. "The life of Sultan Hamengkubuwono IX of Yogyakarta: A Prince in a Republic". Singapore: institut of soul heast asian studies, 2015. Buku.