Enge, E., Spencer, S., & Stricchiola, J. C. (2015). The Art of SEO: Mastering search engine optimazion (Third Edition.). O'Reilly.
Chicago Style (17th ed.) CitationEnge, Eric, Stephan Spencer, and Jessie C. Stricchiola. The Art of SEO: Mastering Search Engine Optimazion. Third Edition. Beijing: O'Reilly, 2015.
ציטוט MLAEnge, Eric, et al. The Art of SEO: Mastering Search Engine Optimazion. Third Edition. O'Reilly, 2015.
אזהרה: ציטוטים אלה לעיתים לא מדויקים ב 100%.