Haggard, H. W. (1937). Staying young beyond your years. Funk and Wagnalls company.
Citazione stile Chigago Style (17a edizione)Haggard, Howard Wilcox. Staying Young Beyond Your Years. New York: Funk and Wagnalls company, 1937.
Citatione MLA (9a ed.)Haggard, Howard Wilcox. Staying Young Beyond Your Years. Funk and Wagnalls company, 1937.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.