^ T. D. Kendrick, A History of the Vikings, Courier Dover Publications, 2004, pp.179ff, ISBN 978-0-486-43396-7 ^ a b c d e f g T. D. Kendrick, A History
2018閲覧。 ^ “The Weeknd with Kendrick Lamar "Pray For Me"”. ifpi.dk (May 15, 2018). May 22, 2017閲覧。 ^ “The Weeknd & Kendrick Lamar – Pray for Me” (Swedish)