International Protea Research Symposium Cape Town, South Africa, International Society for Horticultural Science. Protea Working Group, International Society for Horticultural Science. Section for Ornamental Plants, Meynhardt, J. T., Ben-Jaacov, J., & Ferreira, D. I. (1986). First International Protea Research Symposium: Cape Town, South Africa, 28 and 29 August 1985. International Society for Horticultural Science.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)International Protea Research Symposium Cape Town, South Africa, International Society for Horticultural Science. Protea Working Group, International Society for Horticultural Science. Section for Ornamental Plants, J. T. Meynhardt, J. Ben-Jaacov, و D. I. Ferreira. First International Protea Research Symposium: Cape Town, South Africa, 28 and 29 August 1985. Wageningen, Netherlands: International Society for Horticultural Science, 1986.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)International Protea Research Symposium Cape Town, South Africa, et al. First International Protea Research Symposium: Cape Town, South Africa, 28 and 29 August 1985. International Society for Horticultural Science, 1986.