APA

Gymer R. G., . (1973). Chemistry: an ecological approach. New York: Harper & Row.

Chicago

Gymer Roger G, . 1973. Chemistry: an ecological approach. New York: Harper & Row.

Harvard

Gymer R. G., . (1973). Chemistry: an ecological approach. New York: Harper & Row.

MLA

Gymer Roger G, . Chemistry: an ecological approach. New York: Harper & Row. 1973.