Hammer, D. (1988). Peak energy: The high-oxigen program for more energy now! G.P. Putnam's.
Citazione stile Chigago Style (17a edizione)Hammer, Daniel. Peak Energy: The High-oxigen Program for More Energy Now! G.P. Putnam's, 1988.
Citatione MLA (9a ed.)Hammer, Daniel. Peak Energy: The High-oxigen Program for More Energy Now! G.P. Putnam's, 1988.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.