Cita APA (7a ed.)

Drewry, H. N., O'Connor, T., & Freidel, F. (1978). America is. Merrill.

Cita Chicago Style (17a ed.)

Drewry, Henry N., Thomas O'Connor, y Frank Freidel. America Is. Columbus, Ohio [u.a.]: Merrill, 1978.

Cita MLA (9a ed.)

Drewry, Henry N., et al. America Is. Merrill, 1978.