APA (7th ed.) Citation

Borchardt, K. National Rivalry among Hospitallers? Instituto de Estudos Medievais.

Chicago Style (17th ed.) Citation

Borchardt, Karl. National Rivalry Among Hospitallers? Instituto de Estudos Medievais.

MLA (9th ed.) Citation

Borchardt, Karl. National Rivalry Among Hospitallers? Instituto de Estudos Medievais.

Warning: These citations may not always be 100% accurate.