Gaya APA

Knopf, A, A. (1956). Willa Cather in Europre . New York: The Executors of the Estate of Willa Cather.

Gaya MLA

Knopf, Alfred, A.. "Willa Cather in Europre". New York: The Executors of the Estate of Willa Cather, 1956. Text.