APA

O'Neill O., . (1977). Indigo nights. New York: Berkley medallion book.

Chicago

O'Neill Olivia, . 1977. Indigo nights. New York: Berkley medallion book.

Harvard

O'Neill O., . (1977). Indigo nights. New York: Berkley medallion book.

MLA

O'Neill Olivia, . Indigo nights. New York: Berkley medallion book. 1977.