Johnson, A., Printz, J. B., & Winthrop, J. (1930). The Instruction for Johan Printz, governor of New Sweden: "the first constitution or supreme law of the states of Pennsylvania and Delaware;". Philadelphia: Swedish colonial Society.

Johnson, Amandus, Johan Björnsson Printz, and John Winthrop. The Instruction for Johan Printz, Governor of New Sweden: "the First Constitution or Supreme Law of the States of Pennsylvania and Delaware;". Philadelphia: Swedish colonial Society, 1930.

Johnson, Amandus, Johan Björnsson Printz, and John Winthrop. The Instruction for Johan Printz, Governor of New Sweden: "the First Constitution or Supreme Law of the States of Pennsylvania and Delaware;". Philadelphia: Swedish colonial Society, 1930.