Não informado. (1905). School science and mathematics. School Science and Mathematics Association.
Citação do estilo Chicago (17ª ed.)Não informado. School Science and Mathematics. Menasha, Wis: School Science and Mathematics Association, 1905.
Citação MLA (8ª ed.)Não informado. School Science and Mathematics. School Science and Mathematics Association, 1905.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.