Gaya APA

Gifford, C. (2009). Pelapukan dan Erosi (Weathering and Erosion) . Solo: Tiga Serangkai Pustaka Mandiri.

Gaya MLA

Gifford, C.. Pelapukan dan Erosi (Weathering and Erosion). Solo: Tiga Serangkai Pustaka Mandiri, 2009. .