Jubase, Nolwethu, Ross T. Shackleton, and John Measey. “Motivations and Contributions of Volunteer Groups in the Management of Invasive Alien Plants in South Africa’s Western Cape Province”. Bothalia, African Biodiversity & Conservation 51, no. 2 (July 8, 2021). Accessed July 29, 2021. https://abcjournal.org/index.php/BothaliaABC/article/view/201.