Mulcahy, M. G. D. (1998). Our Lady's Grotto, Mount St Mary's College, Emmitsburg, Maryland. Mount St Mzary's College.
Chicago-viite (17. p.)Mulcahy, Msgr George D1998. Our Lady's Grotto, Mount St Mary's College, Emmitsburg, Maryland. Emmitsburg , MD: Mount St Mzary's College, 1998.
MLA-viite (8. p.)Mulcahy, Msgr George D1998. Our Lady's Grotto, Mount St Mary's College, Emmitsburg, Maryland. Mount St Mzary's College, 1998.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.