Westermarck, N. (1957). Finnish agriculture. (2nd ed.). Pellervo Society.
Cita Chicago (17th ed.)Westermarck, Nil's. Finnish Agriculture. 2nd ed. Helsinki: Pellervo Society, 1957.
Cita MLA (9th ed.)Westermarck, Nil's. Finnish Agriculture. 2nd ed. Pellervo Society, 1957.
Atenció: Aquestes cites poden no estar 100% correctes.