Library of Congress & Gale Research Company. (1971). English language books by title: A catalog of Library of Congress printed cards, 1969-1970 cumulation. Gale Research Co..
Citação do estilo Chicago (17ª ed.)Library of Congress e Gale Research Company. English Language Books by Title: A Catalog of Library of Congress Printed Cards, 1969-1970 Cumulation. Detroit: Gale Research Co., 1971.
Citação MLA (8ª ed.)Library of Congress e Gale Research Company. English Language Books by Title: A Catalog of Library of Congress Printed Cards, 1969-1970 Cumulation. Gale Research Co., 1971.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.