APA (7th ed.) Zitazioa

Robinson, S. Guano: A Treatise of Practical Information for Farmers.

Chicago Style (17th ed.) Zitazioa

Robinson, Solon. Guano: A Treatise of Practical Information for Farmers.

MLA (9th ed.) Zitazioa

Robinson, Solon. Guano: A Treatise of Practical Information for Farmers.

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