Jan Pieterszoon Sweelinck - Classical Composers Database entry with comments on the popularity and availability of his keyboard and vocal compositions including work on the Geneva Psalter.
Jan Pieterszoon Sweelinck - Musica Classica Classical Music Dictionary entry with life, works, portrait, and MIDI audio file.
Sweelinck, Jan Pieterszoon (1562 - 1621), Netherlands - Biographical data, recommended CDs, books and sheet music, bibliography, and link to biographical essay from Dr. Estrella's Incredibly Abridged Dictionary of Composers.