APA (7th ed.) Citation

Wingren, G. (1958). The Christian's Calling: Luther on Vocation. Oliver and Boyd.

Chicago Style (17th ed.) Citation

Wingren, Gustaf. The Christian's Calling: Luther on Vocation. Oliver and Boyd, 1958.

MLA (8th ed.) Citation

Wingren, Gustaf. The Christian's Calling: Luther on Vocation. Oliver and Boyd, 1958.

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