APA (7th ed.) Citation

Gray, A. N. (1930). Rohphosphate und Superphosphate. International Superphosphate Manufacturers Ass.

Chicago Style (17th ed.) Citation

Gray, A. N. Rohphosphate Und Superphosphate. London: International Superphosphate Manufacturers Ass, 1930.

MLA (9th ed.) Citation

Gray, A. N. Rohphosphate Und Superphosphate. International Superphosphate Manufacturers Ass, 1930.

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