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Roncière 1965, p. 47. Roncière, Monique de la (1965). "Manuscript Charts by John Thornton, Hydrographer of the East India Company (1669- 1701)". Imago Mundi. 19: 46–50. doi:10.1080/03085696508592265. JSTOR1150328.
Macey 1979, pp. 530, 533. Macey, Samuel L. (1979). "Review: The Compleat Plattmaker: British Chart and Map Making, 1650-1750". Eighteenth-Century Studies. 12 (4). The Johns Hopkins University Press: 527–537. doi:10.2307/2738459. JSTOR2738459.
Roncière 1965, pp. 46, 47. Roncière, Monique de la (1965). "Manuscript Charts by John Thornton, Hydrographer of the East India Company (1669- 1701)". Imago Mundi. 19: 46–50. doi:10.1080/03085696508592265. JSTOR1150328.
Roncière 1965, p. 46. Roncière, Monique de la (1965). "Manuscript Charts by John Thornton, Hydrographer of the East India Company (1669- 1701)". Imago Mundi. 19: 46–50. doi:10.1080/03085696508592265. JSTOR1150328.
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