Parkinson, C. (2023). Illustrations, of Indian forest plants Part 4 – Hopea helferi (Dyer) Brandis, Hopea oblongifolia Dyer, Shorea floribunda Wall., Shorea assamica Dyer and Shorea sericeiflora fisher and Hutchinson. Manager of Publications, Government of India, Delhi.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Parkinson, C.E. Illustrations, of Indian Forest Plants Part 4 – Hopea Helferi (Dyer) Brandis, Hopea Oblongifolia Dyer, Shorea Floribunda Wall., Shorea Assamica Dyer and Shorea Sericeiflora Fisher and Hutchinson. Manager of Publications, Government of India, Delhi, 2023.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Parkinson, C.E. Illustrations, of Indian Forest Plants Part 4 – Hopea Helferi (Dyer) Brandis, Hopea Oblongifolia Dyer, Shorea Floribunda Wall., Shorea Assamica Dyer and Shorea Sericeiflora Fisher and Hutchinson. Manager of Publications, Government of India, Delhi, 2023.