Gaya APA
Watkin, E.
(1950).
A philosophy of form, [3d ed.]. Penerbitan asli 1938.
.
London dsl:
Sheed and Ward.
Gaya MLA
Watkin, E.I..
"A philosophy of form, [3d ed.]. Penerbitan asli 1938. ".
London dsl:
Sheed and Ward,
1950.
Buku.