Cita APA

Helwich, O., & Baring, J. L. (1936). Practical infra-red photography. Fountain Press.

Citación estilo Chicago

Helwich, Othmar, and J. L. Baring. Practical Infra-red Photography. London: Fountain Press, 1936.

Cita MLA

Helwich, Othmar, and J. L. Baring. Practical Infra-red Photography. Fountain Press, 1936.

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