Pedersen, E. (1968). House upon a rock. Ahteneum Publishers.
Lua i Stíl Chicago (17ú heag.)Pedersen, Elsa. House upon a Rock. New York: Ahteneum Publishers, 1968.
Lua MLA (9ú heag.)Pedersen, Elsa. House upon a Rock. Ahteneum Publishers, 1968.
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