APA (7th ed.) Citation

Darwin, M. Preface. Universitas Gadjah Mada.

Chicago Style (17th ed.) Citation

Darwin, Muhadjir. Preface. Universitas Gadjah Mada.

MLA (9th ed.) Citation

Darwin, Muhadjir. Preface. Universitas Gadjah Mada.

Warning: These citations may not always be 100% accurate.