APA (7th ed.) Citation

Christensen, T. G. (1990). An African tree of life. Orbis Books.

Chicago Style (17th ed.) Citation

Christensen, Thomas G. An African Tree of Life. Maryknoll, N.Y.: Orbis Books, 1990.

MLA (8th ed.) Citation

Christensen, Thomas G. An African Tree of Life. Orbis Books, 1990.

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