J.  Sinclair, ?A revision of the Malayan Annonaceae?, Gardens' Bulletin. Straits Settlements, Serie 3Gardens' Bulletin. Straits Settlements, Serie 3, vol. 14, pp. 149-516, 1955.

J.  Sinclair, ?The flora of Cox's Bazar, East Pakistan?, Bulletin of the Botanical Society of BengalBulletin of the Botanical Society of Bengal, vol. 9, pp. 84-116, 1955.

J.  Sinclair, ?Notes on New Guinea Annonaceae, Part I?, Gardens' Bulletin. Straits Settlements, Serie 3Gardens' Bulletin. Straits Settlements, Serie 3, vol. 15, pp. 4-13, 1956.

J.  Sinclair, ?Miscellaneous notes on Annonaceae?, Gardens' Bulletin. Straits Settlements, Serie 3Gardens' Bulletin. Straits Settlements, Serie 3, vol. 15, pp. 14-17, fig. 1-2, 1956.

J.  Sinclair, ?A new species of Goniothalamus from peat swamp forests in Borneo?, Gardens' Bulletin. Straits Settlements, Serie 3Gardens' Bulletin. Straits Settlements, Serie 3, vol. 18, pp. 98-101; fig. 1, 1961.

J.  Sinclair, ?Notes on Bornean Annonaceae?, Sarawak Museum JournalSarawak Museum Journal, vol. 5, pp. 597-609; fig. 1, 1951.

J.  Sinclair, ?Notes on Siamese Annonaceae?, Gardens' Bulletin. Straits Settlements, Serie 3Gardens' Bulletin. Straits Settlements, Serie 3, vol. 14, pp. 40-44, 1953.