Gaya APA

COATS, C., PANGGABEAN, R. (1996). Living Energies: An Exposition of concepts related to the theories of Viktor Schauberger . Bath (UK): Gateway Books.

Gaya MLA

COATS, Callum., PANGGABEAN, Ratna. "Living Energies: An Exposition of concepts related to the theories of Viktor Schauberger". Bath (UK): Gateway Books, 1996. Buku Teks.