APA (7th ed.) Citation

Geological Society of South Africa & Geological Society of South Africa. Alex. L. du Toit memorial lectures. [publisher not identified].

Chicago Style (17th ed.) Citation

Geological Society of South Africa and Geological Society of South Africa. Alex. L. Du Toit Memorial Lectures. Johannesburg: [publisher not identified].

MLA (9th ed.) Citation

Geological Society of South Africa and Geological Society of South Africa. Alex. L. Du Toit Memorial Lectures. [publisher not identified].

Warning: These citations may not always be 100% accurate.