APA-referens (7:e uppl.)

Metcalfe, S. L. (1833). A new theory of terrestrial magnetism: (Read before the New-York Lyceum of Natural History.). G.& C.& H. Carvill.

Chicago-referens (17:e uppl.)

Metcalfe, Samuel L. A New Theory of Terrestrial Magnetism: (Read Before the New-York Lyceum of Natural History.). New York: G.& C.& H. Carvill, 1833.

MLA-referens (8:e uppl.)

Metcalfe, Samuel L. A New Theory of Terrestrial Magnetism: (Read Before the New-York Lyceum of Natural History.). G.& C.& H. Carvill, 1833.