Cita APA (7a ed.)

Johnston, E. S. (1934). Phototropic sensitivity in relation to wave length. Smithsonian Institution.

Cita Chicago Style (17a ed.)

Johnston, Earl S. Phototropic Sensitivity in Relation to Wave Length. Washington: Smithsonian Institution, 1934.

Cita MLA (8a ed.)

Johnston, Earl S. Phototropic Sensitivity in Relation to Wave Length. Smithsonian Institution, 1934.