Cress, P. (1970). FORTRAN IV with WATFIV. Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Cress, Paul. FORTRAN IV with WATFIV. Englewood, Cliffs, N.J: Prentice-Hall, 1970.
Lua MLA (9ú heag.)Cress, Paul. FORTRAN IV with WATFIV. Prentice-Hall, 1970.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.