Gaya APA

A, P, P, L, &, V, R. (2005). PHYSIOLOGIC NATURE OF SLEEP, THE . : CV. Spektra Anugerahabadi.

Gaya MLA

A, Parmeggiani, Pier, Luigi, &, Velluti, Ricardo. "PHYSIOLOGIC NATURE OF SLEEP, THE". : CV. Spektra Anugerahabadi, 2005. Tadris Biologi.