Parker, G., & Smith, L. M. (1985). The general crisis of the seventeenth century. London: Routledge & Kegan Paul.
Dyfyniad Arddull ChicagoParker, Geoffrey, and Lesley M. Smith. The General Crisis of the Seventeenth Century. London: Routledge & Kegan Paul, 1985.
Dyfyniad MLAParker, Geoffrey, and Lesley M. Smith. The General Crisis of the Seventeenth Century. London: Routledge & Kegan Paul, 1985.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.