Cita APA (7a ed.)
Pennington, A. (1954). Concrete Farm Structures.
Cita estilo Chicago (17a ed.)
Pennington, A.M. Concrete Farm Structures. 1954.
Cita MLA (9a ed.)
Pennington, A.M. Concrete Farm Structures. 1954.
Advarsel: Disse citationer er muligvist ikke 100% nøjagtige.