Gaya APA

Pilliangsani, H., M. (2013). BACKPACKING: MEDAN-BRASTAGI-TOBA . Jakarta: PT. Elex Media Komputindo.

Gaya MLA

Pilliangsani, H., M.. BACKPACKING: MEDAN-BRASTAGI-TOBA. Jakarta: PT. Elex Media Komputindo, 2013. .