APA

Harkonen H. B., Nelson R. C., . (1965). Farms and farmers in art. Minneapolis: Lerner Publications Co.

Chicago

Harkonen Helen Bernice, Nelson Robert Clark, . 1965. Farms and farmers in art. Minneapolis: Lerner Publications Co.

Harvard

Harkonen H. B., Nelson R. C., . (1965). Farms and farmers in art. Minneapolis: Lerner Publications Co.

MLA

Harkonen Helen Bernice, Nelson Robert Clark, . Farms and farmers in art. Minneapolis: Lerner Publications Co. 1965.