(原始内容存档于2018-04-06) (英语). Prof. Bobby McFerrin – Universität der Künste Berlin. [2018-12-24]. (原始内容存档于2021-03-02). Charles Leonard. McFerrin steps out of the
[2010-07-20]. (原始内容存档于2018-08-15). Bobby Cochran and Susan Van Hecke. Three Steps to Heaven — The Eddie Cochran Story. Hal Leonard Corporation. 2003 [2013-09-02]