APA

Butrica A. J., Douglas D. G., . (1990). Out of thin air. New York, NY [u.a.]: Praeger.

Chicago

Butrica Andrew J, Douglas Deborah G, . 1990. Out of thin air. New York, NY [u.a.]: Praeger.

Harvard

Butrica A. J., Douglas D. G., . (1990). Out of thin air. New York, NY [u.a.]: Praeger.

MLA

Butrica Andrew J, Douglas Deborah G, . Out of thin air. New York, NY [u.a.]: Praeger. 1990.