Cita APA (7a ed.)

VERSTAPPEN, H. T. (1973). A Geomorphological reconnaissance of Sumatera and Adjacent Islands (Indonesia). Wolters - Noordhoffnv Groningen.

Cita Chicago Style (17a ed.)

VERSTAPPEN, H. Th. A Geomorphological Reconnaissance of Sumatera and Adjacent Islands (Indonesia). Wolters - Noordhoffnv Groningen, 1973.

Cita MLA (8a ed.)

VERSTAPPEN, H. Th. A Geomorphological Reconnaissance of Sumatera and Adjacent Islands (Indonesia). Wolters - Noordhoffnv Groningen, 1973.