Lua APA (7ú heag.)

Spring, T. The 10 most annoying types of online ads. PC World Philippines.

Lua i Stíl Chicago (17ú heag.)

Spring, Tom. "The 10 Most Annoying Types of Online Ads." PC World Philippines .

Lua MLA (9ú heag.)

Spring, Tom. "The 10 Most Annoying Types of Online Ads." PC World Philippines, .

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