APA (7th ed.) Citation

Western Australia. Department of Agriculture. (1937). The pH scale. Fred. Wm. Simpson, Government Printer.

Chicago Style (17th ed.) Citation

Western Australia. Department of Agriculture. The PH Scale. Perth: Fred. Wm. Simpson, Government Printer, 1937.

MLA (9th ed.) Citation

Western Australia. Department of Agriculture. The PH Scale. Fred. Wm. Simpson, Government Printer, 1937.

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