Giovannitti, Len
The decision to drop the bomb / Len Giovannitti and Fred Freed
Coward-McCann, 1965
 Buku Teks
Steele, Fred I
Physical settings and organizational development/ Freed I Steele
Addison-Wesley, 1973
 Buku Teks
Nadiya Agivia Larosa
Majas pada Lirik Lagu Suzan & Freek dalam Album Dromen In Kleur = Figurative Language in Suzan & Freek's Song Lyrics in the Album Dromen In Kleur
Fakultas Ilmu Pengetahuan Budaya Universitas Indonesia, 2023
 UI - Tugas Akhir
Bernard Arps
Princess sodara kartika frees amir from prison: The epic of amir hamza (?16th century)
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2021
 Artikel Jurnal
Jonge, Freek de
Leven na de dood : en alle andere liedjes / door Freek de Jonge
Rainbow Pockets, 2004
 Buku Teks