Catalogue of Opera Librettos Printed Before 1800: Library of Congress

MLA

Sonneck, Oscar G. Catalogue of Opera Librettos Printed Before 1800: Library of Congress. Washington, DC: Government Printing Office, 1914.

APA

Sonneck, O. G. (1914). Catalogue of Opera Librettos Printed Before 1800: Library of Congress. Washington, DC: Government Printing Office.

Chicago

Sonneck, Oscar G. Catalogue of Opera Librettos Printed Before 1800: Library of Congress. Washington, DC: Government Printing Office, 1914.