Cita APA (7th ed.)

Hammer, D. (1988). Peak energy: The high-oxigen program for more energy now! G.P. Putnam's.

Cita Chicago (17th ed.)

Hammer, Daniel. Peak Energy: The High-oxigen Program for More Energy Now! G.P. Putnam's, 1988.

Cita MLA (9th ed.)

Hammer, Daniel. Peak Energy: The High-oxigen Program for More Energy Now! G.P. Putnam's, 1988.