APA (7th ed.) Citation

Lengyel, P., & Aron, R. (1971). Approaches to the science of socio-economic development. Unesco.

Chicago Style (17th ed.) Citation

Lengyel, Peter, and Raymond Aron. Approaches to the Science of Socio-economic Development. Paris: Unesco, 1971.

MLA (8th ed.) Citation

Lengyel, Peter, and Raymond Aron. Approaches to the Science of Socio-economic Development. Unesco, 1971.

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