APA (7th ed.) Citation

Ilford, ltd. (1950). Photography as an aid to scientific work (8th ed.). Ilford.

Chicago Style (17th ed.) Citation

Ilford, ltd. Photography as an Aid to Scientific Work. 8th ed. London: Ilford, 1950.

MLA (9th ed.) Citation

Ilford, ltd. Photography as an Aid to Scientific Work. 8th ed. Ilford, 1950.