APA

LI M. C., NIXON W. E. & FREEMAN M. V. (20000701). Increase of urinary citrovorum factor activity in patients receiving methotrexate (amethopterin). : Proceedings of the Society for Experimental Biology and Medicine. Society for Experimental Biology and Medicine (New York, N.Y.).

Chicago

LI M C, NIXON W E and FREEMAN M V. 20000701. Increase of urinary citrovorum factor activity in patients receiving methotrexate (amethopterin). : Proceedings of the Society for Experimental Biology and Medicine. Society for Experimental Biology and Medicine (New York, N.Y.).

Harvard

LI M. C., NIXON W. E. and FREEMAN M. V. (20000701). Increase of urinary citrovorum factor activity in patients receiving methotrexate (amethopterin). : Proceedings of the Society for Experimental Biology and Medicine. Society for Experimental Biology and Medicine (New York, N.Y.).

MLA

LI M C, NIXON W E and FREEMAN M V. Increase of urinary citrovorum factor activity in patients receiving methotrexate (amethopterin). : Proceedings of the Society for Experimental Biology and Medicine. Society for Experimental Biology and Medicine (New York, N.Y.). 20000701.