Tertiary Sources Tertiary sources serve as collection of primary and secondary sources. Examples: bibliographies directories abstracts indexes dictionary almanac encyclopedias databases In using the information gathered whether they are primary, secondary or tertiary sources, take note of these six (6) characteristics that information should have. 1. Accuracy. Information should be reliable, useful, free from flaws and of high quality 2. Completeness. Information should provide all needed details. It should be able to answer the wh- questions (what, who, when, where, why and how). 3. Timeliness. Information should be up-to-date. 4. Consistency. Information should be consistent for it to be considered accurate and useful. 5. Relevant. Information should suit the demand, needs and interests of the readers. 6. Uniqueness. Information should be distinct.​