APA

MARTHA PENNIGAR - GEORGE BIDDLE, .THE GRAPHIC WORK OF GEORGE BIDDLE WITH CATALOGUE RAISONNE. Washington, D.C: THE CORCORAN GALLERY OF ART.

Chicago

MARTHA PENNIGAR - GEORGE BIDDLE, .THE GRAPHIC WORK OF GEORGE BIDDLE WITH CATALOGUE RAISONNE. Washington, D.C: THE CORCORAN GALLERY OF ART.

Harvard

MARTHA PENNIGAR - GEORGE BIDDLE, .THE GRAPHIC WORK OF GEORGE BIDDLE WITH CATALOGUE RAISONNE. Washington, D.C: THE CORCORAN GALLERY OF ART.

MLA

MARTHA PENNIGAR - GEORGE BIDDLE, .Washington, D.C: THE CORCORAN GALLERY OF ART. .