California Farm Bureau Federation & Contra Costa County Farm Bureau (Calif.). (1924). Contra Costa County farm bureau monthly. Contra Costa County Farm Bureau.
Čikaški stil citiranja (17. izdanje)California Farm Bureau Federation i Contra Costa County Farm Bureau (Calif.). Contra Costa County Farm Bureau Monthly. Hayward, Calif.: Contra Costa County Farm Bureau, 1924.
MLA način citiranja (8. izdanje)California Farm Bureau Federation i Contra Costa County Farm Bureau (Calif.). Contra Costa County Farm Bureau Monthly. Contra Costa County Farm Bureau, 1924.
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