Enge, E. (2013). Die kunst des SEO. O'Reilly Media Germany.
Chicago Style (17th ed.) CitationEnge, Eric. Die Kunst Des SEO. [Germany]: O'Reilly Media Germany, 2013.
MLA (9th ed.) CitationEnge, Eric. Die Kunst Des SEO. O'Reilly Media Germany, 2013.
Warning: These citations may not always be 100% accurate.