APA

O’Brien S., . (1992). WILLA CATHER. NEWYORK: THE LIBRARY OF AMERICA.

Chicago

O’Brien Sharon, . 1992. WILLA CATHER. NEWYORK: THE LIBRARY OF AMERICA.

Harvard

O’Brien S., . (1992). WILLA CATHER. NEWYORK: THE LIBRARY OF AMERICA.

MLA

O’Brien Sharon, . WILLA CATHER. NEWYORK: THE LIBRARY OF AMERICA. 1992.