APA (7th ed.) Citation

Harris, J. H. (1919). Africa: Slave or free? Student Christian Movement.

Chicago Style (17th ed.) Citation

Harris, John H. Africa: Slave or Free? London: Student Christian Movement, 1919.

MLA (9th ed.) Citation

Harris, John H. Africa: Slave or Free? Student Christian Movement, 1919.

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