VanderWerf, Eric A.; Wiles, Gary J.; Marshall, Ann P. & Knecht, Melia (2006): Observations of migrants and other birds in Palau, April–May 2005, including the first Micronesian record of a Richard's Pipit. Micronesica 39(1): 11-29. PDF fulltext
Wiles, Gary J.; Worthington, David J.; Beck, Robert E. Jr.; Pratt, H. Douglas; Aguon, Celestino F. & Pyle, Robert L. (2000): Noteworthy Bird Records for Micronesia, with a Summary of Raptor Sightings in the Mariana Islands, 1988-1999. Micronesica 32(2): 257-284. PDF fulltext
Badyaev, A. V., B. Kessel, and D. D. Gibson. 1998. Yellow Wagtail (Motacilla flava). In The Birds of North America, No. 382 (A. Poole and F. Gill, eds.). The Birds of North America, Inc., Philadelphia, PA.
Fraker MA & Fraker RN. (1980). Yellow Wagtail Motacilla-Flava East of the Mackenzie Delta Canada. Canadian Field Naturalist. vol 94, no 4. p. 465-466.
Hunt J & Standring I. (1995). A yellow wagtail Motacilla flava at Lake Mclarty. Western Australian Naturalist. vol 20, no 2. p. 61-64.
Johnstone RE. (1982). The Yellow Wagtail Motacilla-Flava in Australia. Western Australian Naturalist. vol 15, no 3. p. 61-66.
Moffatt JD. (1981). Yellow Wagtail Motacilla-Flava on Heron Island Queensland Australia with Notes on the Status of Southern Individuals. Emu. vol 81, no 1. p. 47-48.