APA (7th ed.) Citation

Universal Races Congress London & Spiller, G. (1969). Papers on inter-racial problems. Arno Press.

Chicago Style (17th ed.) Citation

Universal Races Congress London and Gustav Spiller. Papers on Inter-racial Problems. New York: Arno Press, 1969.

MLA (9th ed.) Citation

Universal Races Congress London and Gustav Spiller. Papers on Inter-racial Problems. Arno Press, 1969.