APA (7th ed.) Citation

Christensen, T. G. (1990). An African tree of life. American Society of Missiology series.

Chicago Style (17th ed.) Citation

Christensen, Thomas G. "An African Tree of Life." American Society of Missiology Series 1990.

MLA (8th ed.) Citation

Christensen, Thomas G. "An African Tree of Life." American Society of Missiology Series, 1990.

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