APA (7th ed.) Citation

(1971). A very profitable book to learn English and Spanish. Scolar P..

Chicago Style (17th ed.) Citation

A Very Profitable Book to Learn English and Spanish. Menston: Scolar P., 1971.

MLA (8th ed.) Citation

A Very Profitable Book to Learn English and Spanish. Scolar P., 1971.

Warning: These citations may not always be 100% accurate.