J. P. Guilford
[ca] Joy Paul Guilford
[cs] Joy Paul Guilford
[de] Joy Paul Guilford
[el] Τζόι Πωλ Γκίλφορντ
[es] Joy Paul Guilford
[et] Joy Paul Guilford
[fa] جی. پی. گیلفورد
[fr] Joy Paul Guilford
[hu] Joy Paul Guilford
[id] J.P. Guilford