Balfour, M. (1990). The sign of the serpent: The key to creative physics.
Chicago Style (17th ed.) CitationBalfour, Mark. The Sign of the Serpent: The Key to Creative Physics. 1990.
MLA (8th ed.) CitationBalfour, Mark. The Sign of the Serpent: The Key to Creative Physics. 1990.
Warning: These citations may not always be 100% accurate.