APA

Delany S. R., . (1980). Nebula winners Thirteen. New York: Harper & Row publishers.

Chicago

Delany Samuel R, . 1980. Nebula winners Thirteen. New York: Harper & Row publishers.

Harvard

Delany S. R., . (1980). Nebula winners Thirteen. New York: Harper & Row publishers.

MLA

Delany Samuel R, . Nebula winners Thirteen. New York: Harper & Row publishers. 1980.