APA aipamena

(1921). Develop the power. St. Paul: Harvey Bladyett Company.

Chicago Style aipamena

Develop the Power. St. Paul: Harvey Bladyett Company, 1921.

MLA aipamena

Develop the Power. St. Paul: Harvey Bladyett Company, 1921.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.