Pettigrew, J. B. (1908). Design in nature: Illustrated by spiral and other arrangements in the inorganic and organic kingdoms as exemplified in matter, force, life, growth, rhythms, &c., especially in crystals, plants, and animals. Longman, Green, and co..
Chicago Style (17th ed.) CitationPettigrew, James Bell. Design in Nature: Illustrated by Spiral and Other Arrangements in the Inorganic and Organic Kingdoms as Exemplified in Matter, Force, Life, Growth, Rhythms, &c., Especially in Crystals, Plants, and Animals. London, New York [etc.]: Longman, Green, and co., 1908.
MLA (9th ed.) CitationPettigrew, James Bell. Design in Nature: Illustrated by Spiral and Other Arrangements in the Inorganic and Organic Kingdoms as Exemplified in Matter, Force, Life, Growth, Rhythms, &c., Especially in Crystals, Plants, and Animals. Longman, Green, and co., 1908.