Udden, J. A. (1918). Fossil ice crystals: An instance of the practical value of "pure science". The University.
Citazione stile Chigago Style (17a edizione)Udden, Johan August. Fossil Ice Crystals: An Instance of the Practical Value of "Pure Science". Austin, Tex.: The University, 1918.
Citatione MLA (8a ed.)Udden, Johan August. Fossil Ice Crystals: An Instance of the Practical Value of "Pure Science". The University, 1918.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.