Collins. (2011). CollinsEasy Learning Spanish Grammar. HarperCollins Publishers.
Chicago Style (17th ed.) CitationCollins. CollinsEasy Learning Spanish Grammar. Great Britain: HarperCollins Publishers, 2011.
MLA (9th ed.) CitationCollins. CollinsEasy Learning Spanish Grammar. HarperCollins Publishers, 2011.
Warning: These citations may not always be 100% accurate.