APA (7th ed.) Citation

Heidenstam, O. (1961). Fit at forty and after. Faber.

Chicago Style (17th ed.) Citation

Heidenstam, Oscar. Fit at Forty and After. London: Faber, 1961.

MLA (9th ed.) Citation

Heidenstam, Oscar. Fit at Forty and After. Faber, 1961.

Warning: These citations may not always be 100% accurate.