Cita APA (7a ed.)

Drewry, H. N., O'Connor, T., & Freidel, F. (1987). America is (4. ed.). Merrill.

Cita Chicago Style (17a ed.)

Drewry, Henry N., Thomas O'Connor, y Frank Freidel. America Is. 4. ed. Columbus, Ohio [u.a.]: Merrill, 1987.

Cita MLA (9a ed.)

Drewry, Henry N., et al. America Is. 4. ed. Merrill, 1987.