Cita APA (7th ed.)

Coy, H. (1961). The first book of presidents (Rev. ed.). Watts, F.

Cita Chicago (17th ed.)

Coy, Harold. The First Book of Presidents. Rev. ed. [S.l.]: Watts, F, 1961.

Cita MLA (9th ed.)

Coy, Harold. The First Book of Presidents. Rev. ed. Watts, F, 1961.